1. What does this yellow diamond sign mean?

2. What does this square sign mean?

3. What does this construction sign mean?

4. What do these signs mean if you see a construction worker holding them up?

5. What does this orange sign mean?

6. What does this yellow diamond sign mean?

7. What does this sign mean?

8. What does this sign mean?

9. What does this yellow warning sign mean?

10. What does this white sign with a “not permitted” cross mean?

11. What does this X sign mean?

12. What does this black and white sign mean?

13. What does this yellow sign mean?

14. What does this upside down triangle sign mean?

15. What does this square sign with a red circle mean?

16. What does this warning sign mean?

17. What does this diamond shaped sign with a checkered border and a pointed arrow mean?

18. What does this warning sign with a truck rolling down a hill mean?

19. What does this sign mean?

20. What does this yellow sign mean?